﻿
/**
*  jQuery Color Animations
* @author 愚人码头
* 源自：jQuery UI    jquery.effects.core.js
* 更多http://www.css88.com/archives/4090
*/

; (function (jQuery) {

    // 所有颜色样式
    jQuery.each(['backgroundColor', 'borderBottomColor', 'borderLeftColor', 'borderRightColor', 'borderTopColor', 'color', 'outlineColor'], function (i, attr) {
        jQuery.fx.step[attr] = function (fx) {
            if (fx.state == 0) {
                fx.start = getColor(fx.elem, attr);
                fx.end = getRGB(fx.end);
            }

            fx.elem.style[attr] = "rgb(" + [
				Math.max(Math.min(parseInt((fx.pos * (fx.end[0] - fx.start[0])) + fx.start[0]), 255), 0),
				Math.max(Math.min(parseInt((fx.pos * (fx.end[1] - fx.start[1])) + fx.start[1]), 255), 0),
				Math.max(Math.min(parseInt((fx.pos * (fx.end[2] - fx.start[2])) + fx.start[2]), 255), 0)
            ].join(",") + ")";
        }
    });

    // Color Conversion functions from highlightFade
    // By Blair Mitchelmore
    // http://jquery.offput.ca/highlightFade/
    //一个JavaScript 数组，其中包含 0和255之间的三个数字， (ie [255,255,255]).
    //An RGB 'function call syntax' string. either interger or percentage float form. (ie rgb(255,255,255) or rgb(100%,100%,100%))
    //An RGB hex value. Either short or long form. (ie #FFF or #FFFFFF)
    //A W3C standard colour name string as defined at W3Schools. (ie 'white', 'blue', 'red', 'black', et. al)

    // Parse strings looking for color tuples [255,255,255]
    function getRGB(color) {
        var result;

        // 一个JavaScript 数组，其中包含 0和255之间的三个数字，例如： [255,255,255]
        if (color && color.constructor == Array && color.length == 3)
            return color;

        // Look for rgb(num,num,num)
        if (result = /rgb\(\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*,\s*([0-9]{1,3})\s*\)/.exec(color))
            return [parseInt(result[1]), parseInt(result[2]), parseInt(result[3])];

        // Look for rgb(num%,num%,num%)
        if (result = /rgb\(\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\%\s*,\s*([0-9]+(?:\.[0-9]+)?)\%\s*\)/.exec(color))
            return [parseFloat(result[1]) * 2.55, parseFloat(result[2]) * 2.55, parseFloat(result[3]) * 2.55];

        // Look for #a0b1c2
        if (result = /#([a-fA-F0-9]{2})([a-fA-F0-9]{2})([a-fA-F0-9]{2})/.exec(color))
            return [parseInt(result[1], 16), parseInt(result[2], 16), parseInt(result[3], 16)];

        // Look for #fff
        if (result = /#([a-fA-F0-9])([a-fA-F0-9])([a-fA-F0-9])/.exec(color))
            return [parseInt(result[1] + result[1], 16), parseInt(result[2] + result[2], 16), parseInt(result[3] + result[3], 16)];

        // Otherwise, we're most likely dealing with a named color
        return colors[jQuery.trim(color).toLowerCase()];
    }

    function getColor(elem, attr) {
        var color;

        do {
            color = jQuery.curCSS(elem, attr);

            // Keep going until we find an element that has color, or we hit the body
            if (color != '' && color != 'transparent' || jQuery.nodeName(elem, "body"))
                break;

            attr = "backgroundColor";
        } while (elem = elem.parentNode);

        return getRGB(color);
    };

    // Some named colors to work with
    // From Interface by Stefan Petre
    // http://interface.eyecon.ro/

    var colors = {
        aqua: [0, 255, 255],
        azure: [240, 255, 255],
        beige: [245, 245, 220],
        black: [0, 0, 0],
        blue: [0, 0, 255],
        brown: [165, 42, 42],
        cyan: [0, 255, 255],
        darkblue: [0, 0, 139],
        darkcyan: [0, 139, 139],
        darkgrey: [169, 169, 169],
        darkgreen: [0, 100, 0],
        darkkhaki: [189, 183, 107],
        darkmagenta: [139, 0, 139],
        darkolivegreen: [85, 107, 47],
        darkorange: [255, 140, 0],
        darkorchid: [153, 50, 204],
        darkred: [139, 0, 0],
        darksalmon: [233, 150, 122],
        darkviolet: [148, 0, 211],
        fuchsia: [255, 0, 255],
        gold: [255, 215, 0],
        green: [0, 128, 0],
        indigo: [75, 0, 130],
        khaki: [240, 230, 140],
        lightblue: [173, 216, 230],
        lightcyan: [224, 255, 255],
        lightgreen: [144, 238, 144],
        lightgrey: [211, 211, 211],
        lightpink: [255, 182, 193],
        lightyellow: [255, 255, 224],
        lime: [0, 255, 0],
        magenta: [255, 0, 255],
        maroon: [128, 0, 0],
        navy: [0, 0, 128],
        olive: [128, 128, 0],
        orange: [255, 165, 0],
        pink: [255, 192, 203],
        purple: [128, 0, 128],
        violet: [128, 0, 128],
        red: [255, 0, 0],
        silver: [192, 192, 192],
        white: [255, 255, 255],
        yellow: [255, 255, 0]
    };

})(jQuery);